Brand name batteries, from Duracell to Energizer, advertise that they last longer than other batteries, including generic ones, which they normally do, but the cost isn't worth it. An unscientific study by batterytruth.info
found that while the branded batteries provide more hours of energy, their high cost makes generic batteries a better deal.
It found that the Thunderbolt Magnum batteries hold less power, but are nearly 57 percent cheaper than the next best value, Duracell CopperTop batteries.
(AP Photo/Mark Lennihan, file)